Vacuum-valve.



No. 677,888. Patented July 9, l90l.

W. H. SHAY.

VACUUM VALVE.

(Application filed June 4, 1900.

(No Model.)

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UNITED STATES v PATENT OFFICE.

WILLIAM HENRY SHAY, OF NEWBURGH, NEW YORK, ASSIGNOR TO J UDSON A.GOODRIOH, OF NEW YORK, N. Y.

VACU U M -'-VALVE.

SPECIFICATION forming part of Letters Patent N 0. 677,888, dated July 9,1901.

To all whom it may concern:

Be it known that I, WILLIAM HENRY SHAY, a citizen of the United States,residing at Newburgh, in the county of Orange and State of New York,have invented a certain new and useful Improvement in Vacuum-Valves, ofwhich the following is a description.

My invention relates to improvements in vacuum-valves adapted for use inconnection with automatic air-valves forsteam-radiators; and the objectof my invention is to provide a simple, cheap, and eflicient device bymeans of which air will be prevented from entering a steam-radiatorafter the steam has been cut oif therefrom and has condensed, whereby aVacuum will be maintained in the radiator, so that upon again turning onlthe steam therein the latter will be more rapidly heated than if itwere allowed to become filled with air.

In carrying myinvention into efiect I screw a cap on the nipple of anydesired form of automatic air-valve and through which the air from theradiator will be expelled by the entering steam, and I provide said capwith an interior valve-seat,with which cooperates an inwardly-closingvacuum-valve, preferably of .the ball type, which automatically seatsitself, whereby the said vacuum-valve will open outwardly to permit ofthe expul- 0 sion of air from within the radiator, but will closeinwardly as soon as the pressure within the radiator or air-valve dropsbelow that of the atmosphere.

In order that my invention may be better understood, attention isdirected to the ac companying drawings, forming part of thisspecification, and in which' Figure l is a vertical sectionalview,partly in elevation, showing my improved vacuumvalve applied to anautomatic air-valve of a common type; Fig. 2, an enlarged sectional viewof my improved device in its preferred form removed from the air-valve;Fig. 3, an interior View looking upward through the cap, and Fig. 4 asection on the line a 4 of Fig. 1 looking downward.

In all of the above Views corresponding parts are represented by thesame numerals of reference.

1 represents an automatic air-valve, which is of any suitable type andwhich is ordinarily provided with a float 2 and with a valve-spindle 3,cooperating with a seat 4,

Application filed June 4, 1900. Serial No. 19,000. (No model.)

said seat after the air has been expelled from the radiator. I

5 is the nipple of the air-valve, generally screw-threaded exteriorly,and engaging said threads is a cap 6, which forms the body of myimproved vacuum-valve. Obviously the connection between the cap 6 andthe nipple 5 may be of any otherdesired kind. The top of the cap isprovided with an opening 7 therein, through which air from the radiatorand air-valve will pass. Carried within the cap is a plug 8, preferablyscrewed in place and formed with an inclined or tapered valveseat 9, andengaging said seat is a valve 10, which closes downward and which, bypreference, is a ball-valve, as shown. Tightness of joint between thecap and nipple is im proved by placing a gasket-ring 11 between thebottom of the plug 8 and the top of said nipple, as shown. In operationthe turning on of steam at the radiator results in the expulsion of airtherefrom, which air passes through the air-valve and up through theopening in the plug 8, elevating the vacuum-valve l0 and escapingthrough the opening 7. As soon as the valvespindle 3 of the air-valvecloses the vacuumvalve 10 will be seated. When steam is turned olf fromthe radiator and begins to condense therein, the creation of a vacuumwithin the radiator causes the atmospheric pressure to force thevacuum-valve 10 more firmly upon its seat,so as to prevent any passageof. air into the radiator, whereby the vacuum therein will be preserved.

Having now described myinvention, what I claim as new, and desire tosecure by Letters Patent, is as follows:

As a new article of manufacture, a vacuum valve adapted to be attachedto an automatic air-valve of a steam-radiator and comprising aninternally-screw threaded cap, a plug screwed into said cap and having atapered valve-seat, and a valve engaging said seat and located betweenthe plug and the top of the cap, substantially as set forth. 1

This specification signed and witnessed this 15th day of May, 1900.

WILLIAM HENRY SHAY.

Witnesses:

FRANK L. DYER, J No. R. TAYLOR.

